[LAB 11 · 从 RGB 到像素：读出、FCN 与边界](/course/notebooks/9e268706471944e3a59e6f568f9ce9a3.html)

# 先预测采样结果，再判断指标名称 · 实现代码
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前景/背景/mIoU口径、RGB到mask训练、FCN与1×1读出及边界
展开完整实现代码
```
import os, tempfile
from pathlib import Path
# Isolated ephemeral workspace supports detached runs with readonly project storage.
SPATIAL_RUN_DIR = Path(tempfile.mkdtemp(prefix='lecture03-'))
os.chdir(SPATIAL_RUN_DIR)
print('Ephemeral experiment directory:', SPATIAL_RUN_DIR)
```